diff --git a/bucket/mingw-mstorsjo-llvm-ucrt.json b/bucket/mingw-mstorsjo-llvm-ucrt.json
index 99c7e48fa8..903143a840 100644
--- a/bucket/mingw-mstorsjo-llvm-ucrt.json
+++ b/bucket/mingw-mstorsjo-llvm-ucrt.json
@@ -1,23 +1,23 @@
 {
-    "version": "20.1.8-20250709",
+    "version": "21.1.0-20250826",
     "description": "LLVM toolchain based on mingw-w64. (UCRT, mstorsjo build)",
     "homepage": "https://github.com/mstorsjo/llvm-mingw/",
     "license": "GPL-3.0-or-later,ZPL-2.1,Apache-2.0 WITH LLVM-exception,ISC",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20250709/llvm-mingw-20250709-ucrt-x86_64.zip",
-            "hash": "82babcd6aae4dc3606e8e0471d816989c384b4bf86a139f184a8b4a1b2c2758d",
-            "extract_dir": "llvm-mingw-20250709-ucrt-x86_64"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20250826/llvm-mingw-20250826-ucrt-x86_64.zip",
+            "hash": "51c347bf5dead6c4383ff16fa9baee362dacceb70ecda9448d2289c8e158af61",
+            "extract_dir": "llvm-mingw-20250826-ucrt-x86_64"
         },
         "32bit": {
-            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20250709/llvm-mingw-20250709-ucrt-i686.zip",
-            "hash": "2e0329a4662710491320f012b61027f504b4e5666b08cb9380fd47e7eb99f75a",
-            "extract_dir": "llvm-mingw-20250709-ucrt-i686"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20250826/llvm-mingw-20250826-ucrt-i686.zip",
+            "hash": "43fce32a369bc5a772eee83562cbb067a2d41f9c0a393112fb768487b3eee883",
+            "extract_dir": "llvm-mingw-20250826-ucrt-i686"
         },
         "arm64": {
-            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20250709/llvm-mingw-20250709-ucrt-aarch64.zip",
-            "hash": "167e9afb1288f6d8c68d0d38f5236d34d3c773768b6d885a39a344c733e46977",
-            "extract_dir": "llvm-mingw-20250709-ucrt-aarch64"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20250826/llvm-mingw-20250826-ucrt-aarch64.zip",
+            "hash": "9c3b0b98ae99de070fdd077aeb1584df4e93f130b68d80f59a03eb723c81addc",
+            "extract_dir": "llvm-mingw-20250826-ucrt-aarch64"
         }
     },
     "post_install": "Copy-Item \"$dir\\bin\\mingw32-make.exe\" \"$dir\\bin\\make.exe\"",